There is my suggestion about video component after checking on other builders. i have checked my blocks on other builder. same blocks are working properly on other platforms(builders) but not working on b2c builder. it always return with undefined or run time error .
so the conclusion is the problem in b2c video player component not in blocks arrangement. please fix this issue in next update. bcoz it is very common and necessary component which must be work properly. i hope you will take it seriously bcoz we cannot make apps like video status or any fun video apps without this component